cd70 front shocks stiffened

1986 point type
My two front shocks seemed too soft. I heard of gas charging (in bigger bikes) or spring replacement to give stiffness. So I told the mechanic to place four used extra rubber seals at the top end of each spring to compress them by an inch even in unloaded position. So it was done. Now when I sit, shocks are not depressed by even one inch. Bump handling has improved a lot. Im 95 kg